20479375

素因数分解:

$5^4\times 7^1\times {\mathrm{31}}^1\times {\mathrm{151}}^1$

素因数の和:209

約数の個数: 40

約数和(自身を含む): 30390272

約数和(自身を除く): 9910897

約数列:

[1, 5, 7, 25, 31, 35, 125, 151, 155, 175, 217, 625, 755, 775, 875, 1057, 1085, 3775, 3875, 4375, 4681, 5285, 5425, 18875, 19375, 23405, 26425, 27125, 32767, 94375, 117025, 132125, 135625, 163835, 585125, 660625, 819175, 2925625, 4095875, 20479375]

約数ペア:

[(1, 20479375), (5, 4095875), (7, 2925625), (25, 819175), (31, 660625), (35, 585125), (125, 163835), (151, 135625), (155, 132125), (175, 117025), (217, 94375), (625, 32767), (755, 27125), (775, 26425), (875, 23405), (1057, 19375), (1085, 18875), (3775, 5425), (3875, 5285), (4375, 4681)]